from collections import Counter

from matplotlib import pyplot as plt


# friend_counts = Counter(num_friends)
# xs = range(101) # 最大值是100
# ys = [friend_counts[x] for x in xs] # height刚好是朋友的个数
# plt.bar(xs, ys)
# plt.axis([0, 101, 0, 25])
# plt.title("朋友数的直方图")
# plt.xlabel("朋友个数")
# plt.ylabel("人数")
# plt.show()
print(5/2)
print(5//2)
